Suprasec 2497 Diphenylmethane diisocyanate Huntsman Polyurethane (PU) - Isocyanates >> MDI, diphenylmethane diisocyanate Used for the formulation of adhesives, coatings and elastomers. Suprasec 2497 Mid functionality MDI Lower reactivity product Often used in the coating area, provides enhanced adhesion, low-temperature stability and excellent flow properties. Low reactivity, mid functionality MDI. Used for the formulation of coatings. Provides enhanced adhesion, low-temperature stability and very good flow properties.